[HTerm-Crosh] Add support for terminal window resizing to terminal API

Add method terminalPrivate.onTerminalResize that will be called by
hterm when its window gets resized.
This is needed by some app we might run in pseudo-terminal that
need to know window size to work properly.

BUG=chromium-os:25947
TEST=Open some file in crosh using vi, and verify that the file is shown
     in full terminal screen.

Review URL: https://chromiumcodereview.appspot.com/9121035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@121827 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_function_dispatcher.cc b/chrome/browser/extensions/extension_function_dispatcher.cc
index 5928091..920dc53 100644
--- a/chrome/browser/extensions/extension_function_dispatcher.cc
+++ b/chrome/browser/extensions/extension_function_dispatcher.cc
@@ -423,6 +423,7 @@
   RegisterFunction<OpenTerminalProcessFunction>();
   RegisterFunction<SendInputToTerminalProcessFunction>();
   RegisterFunction<CloseTerminalProcessFunction>();
+  RegisterFunction<OnTerminalResizeFunction>();
 
 #if defined(USE_VIRTUAL_KEYBOARD)
   // Input